Add 21/16 and 12/63
1st number: 1 5/16, 2nd number: 12/63
21/16 + 12/63 is 505/336.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 63 is 1008
Next, find the equivalent fraction of both fractional numbers with denominator 1008 - For the 1st fraction, since 16 × 63 = 1008,
21/16 = 21 × 63/16 × 63 = 1323/1008 - Likewise, for the 2nd fraction, since 63 × 16 = 1008,
12/63 = 12 × 16/63 × 16 = 192/1008 - Add the two like fractions:
1323/1008 + 192/1008 = 1323 + 192/1008 = 1515/1008 - 1515/1008 simplified gives 505/336
- So, 21/16 + 12/63 = 505/336
In mixed form: 1169/336
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/16+12/63 21/16+24/63 21/32+12/63 63/16+12/63 21/16+36/63 21/48+12/63 21/16+60/63 21/80+12/63 21/16+84/63